Dot inserted on TOC Headings in EPUB doc with Calibre

I am converting an Open Office Doc into EPUB with Calibre and everything works great, except in front of every Chapter Heading in the body of the doc, Calibre adds a single dot. I am using the tag "Heading 1" in Open Office. In the image below you can see the dot to the left of the Chapter title. Is there a way to get rid of this? Thank you!

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